The aircraft, a Lancaster III of 49 Sqn, was flying from Fulbeck to Syerston. The pilot appears to have decided to do a farewell 'beat up' but during this the aircraft hit the ground. It crashed into a building and then into a group of airmen who were parading nearby.
The crew of six was killed and 15 on the ground were killed or died of their injuries later.
I have pinched this info from Bill Chorley's book: "Bomber Command Losses - 1945" and can quote you the names if you wish.
Old Duffer